Deliver Device or Cancel Contract!

I have for the past almost 3 been battling to receive a device I bought from MTN Online. I bought a phone in Oct, it was delivered and in the cooling off period I returned it to get a better version of the device which is when my nightmare started. I was advised to return it to an MTN store which I did on the 25th October (Mall of Africa). The store only issued me a work order number on the 4th Nov R151WR*** which DSV has since validated that this parcel was delivered to the warehouse on the 5th Nov. Every time I call CCI for when the desired device will be delivered they tell me some Lindelani is working on the query and the device will be delivered soon. I have spoken the CCI call centre supervisor, MTN retentions and even DM'd MTN on twitter for a solution but nothing fruitful ever came out of those efforts. My problem is that the debit order goes off on my account like everything is in order and business cares less about my end even though I have alerted them of the issues at hand. Now my hands are tied as I cannot move on to buy a device elsewhere until this matter is resolved. Please do right by me, I don’t owe you guys anything and there is absolutely no need for this ********** and repulsive service. I can't even begin to describe how frustrating this whole nonsense is. A contract goes both ways if I don’t have the device, take your sim card and let’s part ways and stop taking my money for a ghostly device.